In the regular octagon shown below, which of the following is the minimum angle of rotation about center point C will carry the figure onto itself? 1) 15°
2) 30°
3) 45°
4) 90°

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.

Aschool had an election where the candidates received votes in the ratio 1: 2: 3. if the winning candidate received 210 votes, how many total people voted in the election?